I do have factory A/C, the old RV2 compressor is wore out. It never worked that well after it was converted to 134A.
I called Vintage Air they no longer produce a pre 1970 SBM A/C kit due to "problems"
Same "mistake" on my 1965 Dart 273. At the time ~2008, I was a newbie and didn't know how to find parts on ebay and cl, so went to Autozone. I needed a new radiator since the OE upper tank had been attacked by the fan blades, and all they could source was for a ~1972 with lower outlet on pass side plus likely for a slant since 1.5"D lower tube (but not tilted) and the alum w.p. with inlet on pass side was $30 vs $60 for the cast-iron, so did that. Didn't know the alum w.p. end is ~1" further out plus no brackets to fit my TRW p.s. pump to it, so had to get a Federal pump and brackets which almost hits the K-frame. Had to rearrange belts since my 1965 crank damper locates the crank pulleys different axially than later engines. I just posted how I fabb'ed brackets for a Sanden compressor, leveraging one from a ~1989 RamVan.
You sure? Mopar installed thicker torsion bars on cars with factory AC. My 1965 Dart 273 was even worse with a Tecumseh after-market compressor which is like a York but in cast-iron. Perhaps a dealer mod, but AC conversions were also common in the late 1960's by Sears, K-mart, and Western Auto. That beast was installed with the thinner non-AC torsion bars. So heavy that the bracket cracked. I sold the Tecumseh to a guy who would convert to an offroad air compressor, as people do with York AC compressors.
